transmission fails to shift to high gear or overdrive on intermittent basis

Asked by Sep 03, 2015 at 02:10 PM about the 1999 Lexus RX 300 FWD

Question type: Maintenance & Repair

cause of problem and corrective action

10 Answers

http://www.2carpros.com/questions/1999-lexus-rx-300-no-shift-into-overdrive

20 people found this helpful.

I put that alone in a window to make it easy to hyperlink. The is a shift solenoid for O/D inside transmission, problem is I don't know which one. Click for full screen

10 people found this helpful.

Now, this one has all the info, but in Arabic. If you want to go to all the trouble of using Google translate you (we) can probably learn something http://www.mekshat.com/vb/showthread.php?t=352780&page=45

2 people found this helpful.

one more

9 people found this helpful.

http://dannymaddox.com/lexus-rx300-wont-shift-into-overdrive/

6 people found this helpful.

That one says: For whatever reason Toyota engineers programmed an over drive lockout to force you into a service bay and to protect the engine. Like me, you’re probably shaking your head in disbelief that something like not having a gas cap on can cause an OD lock out. Just leave your gas cap off, run it down below a 1/4 tank, hit the freeway and see what happens.

2 people found this helpful.

better focus than other schematic

2 people found this helpful.

By far and large the number one culprit for not shifting in to Overdrive is cold temperature. Lexus RX300’s will not shift into OD until the transmission fluid is up to operating temperature. This is a royal pain in the ass but is normal.. --Danny Maddox

4 people found this helpful.
20

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20

Figured I would chime in, and add my experience for those that stumble upon this... 2000 Lexus RX300 doesn't shift out of 3rd at highway speeds. At 60 mph or so, I'm at 4,000 rpm, and from the driver's seat it feels like fuel is cut for about 2 seconds, and rpm's fall (even when holding accelerator pedal still). If you let off the gas slightly and reapply, you feel a slight "clunk" as the transmission picks up drive again. But no problems whatsoever in gears 1 through 3 around town. I initially thought it was a tranny issue, but I read above that overdrive is not allowed when there's a check engine light (which I have from time to time). Today I didn't have a CEL, so I hit the highway to test the theory. Sure enough, with no check engine light, everything runs perfectly. Good to know that a transmission problem is not to blame. Thought I would share in case someone else is experiencing the same issue.

2 people found this helpful.

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